Solve the Problem $s(t)=t^{2}-8 t$ , Where $s$ Is in Feet And $t$

Multiple Choice

Solve the problem. Round your answer to the nearest tenth, when appropriate.
-The position of an object moving in a straight line is given by $s(t) =t^{2}-8 t$ , where $s$ is in feet and $t$ is the time in seconds the object has been in motion. How long will it take the object to move $6 \mathrm{ft}$ ?

A) $8.5 \mathrm{sec}$
B) $1.2 \mathrm{sec}$
C) $7.0 \mathrm{sec}$
D) $8.7 \mathrm{sec}$